Question for those who know about painting polyurethane parts

[joee76]

I just got my car back with my new GT3 bumper, skirts for Precision Porsche. In bright sunlight is looks like a decent color match, but I did have my reservations about the color when I visted the body shop earlier in the week.

Now that the parts are actually on the car, I am certain that the colors are different. I have a 2000 Boxster in Silver. As some of you know, there are basically 3 variations of silver:

-Artic Silver Metalic
-Meridien Metalic
-Polar Silver

I kindly pointed out the color difference before I took the car back. The guy at the shop explained that the color is a result of my bumper/skirt being polyurethane and also having fresh paint on, so it looks a different color, as a result. "That's the problem when you have metallic paint on polyurethane. Also, your original paint is 10 years old, so that is why it seems darker", they said. The also said that the bumper is more angled to reflect light differently

Is this true ? That they can't color match properly because it's painted polyurethane and not painted metal ? I just don't buy it. I asked how they color matched it. They said they grabbed the color code/formula for my specific color from porsche. They also said my results would be better if I paid them to blend the paint to the rest of the adjecent parts.

I'm going to go back this week and take off the gas cover to show them that the colors are different, even at the same angles.

But if someone can shed some light on 'not being able to color match b/c it's polyurethane' explanation, that would be great.